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BOLT12: reject zero-length blinded paths.

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This is a good idea, but also specifically called out in the latest BOLT spec.

Signed-off-by: Rusty Russell <rusty@rustcorp.com.au>
This commit is contained in:
Rusty Russell 2024-08-01 09:33:34 +09:30
parent 18fc1b82b0
commit 2ecf5e6bd5
1 changed files with 22 additions and 0 deletions
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22
common/bolt12.c
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@ -228,6 +228,17 @@ struct tlv_offer *offer_decode(const tal_t *ctx,
return tal_free(offer);
}
/* BOLT-offers #12:
* - if `num_hops` is 0 in any `blinded_path` in `offer_paths`:
* - MUST NOT respond to the offer.
*/
for (size_t i = 0; i < tal_count(offer->offer_paths); i++) {
if (tal_count(offer->offer_paths[i]->path) == 0) {
*fail = tal_strdup(ctx, "Offer contains an empty offer_path");
return tal_free(offer);
}
}
return offer;
}
@ -285,6 +296,17 @@ struct tlv_invoice_request *invrequest_decode(const tal_t *ctx,
return tal_free(invrequest);
}
/* BOLT-offers #12:
* - if `num_hops` is 0 in any `blinded_path` in `invreq_paths`:
* - MUST fail the request.
*/
for (size_t i = 0; i < tal_count(invrequest->invreq_paths); i++) {
if (tal_count(invrequest->invreq_paths[i]->path) == 0) {
*fail = tal_strdup(ctx, "Invoice request contains an empty invreq_path");
return tal_free(invrequest);
}
}
return invrequest;
}